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Partially rm 'ssl' input from populate_transform()

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Manuel Pégourié-Gonnard 2019-05-06 13:48:22 +02:00
parent 0bcfbc3e04
commit 1d10a98f56
1 changed files with 26 additions and 11 deletions
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37
library/ssl_tls.c
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@ -619,16 +619,23 @@ typedef int ssl_tls_prf_t(const unsigned char *, size_t, const char *,
* Parameters:
* - [in/out]: transform: structure to populate
* [in] must be just initialised with mbedtls_ssl_transform_init()
* [out] fully populate, ready for use by mbedtls_ssl_{en,de}crypt_buf()
* [out] fully populated, ready for use by mbedtls_ssl_{en,de}crypt_buf()
* - [in] session: used: ciphersuite, encrypt_then_mac, master, compression
* - [in] tls_prf: pointer to PRF to use for key derivation
* - [in] randbytes: buffer holding ServerHello.random + ClientHello.random
* - [in] ssl: used members: minor_ver, conf->endpoint
* - [in] minor_ver: SSL/TLS minor version
* - [in] endpoint: client or server
* - [in] ssl: optionally used for:
* - MBEDTLS_SSL_HW_RECORD_ACCEL: whole context
* - MBEDTLS_SSL_EXPORT_KEYS: ssl->conf->{f,p}_export_keys
* - MBEDTLS_DEBUG_C: ssl->conf->{f,p}_dbg
*/
static int ssl_populate_transform( mbedtls_ssl_transform *transform,
const mbedtls_ssl_session *session,
ssl_tls_prf_t tls_prf,
const unsigned char randbytes[64],
int minor_ver,
unsigned endpoint,
const mbedtls_ssl_context *ssl )
{
int ret = 0;
@ -644,11 +651,17 @@ static int ssl_populate_transform( mbedtls_ssl_transform *transform,
const mbedtls_cipher_info_t *cipher_info;
const mbedtls_md_info_t *md_info;
#if !defined(MBEDTLS_SSL_HW_RECORD_ACCEL) && \
!defined(MBEDTLS_SSL_EXPORT_KEYS) && \
!defined(MBEDTLS_DEBUG_C)
(void) ssl;
#endif
/* Copy info about negotiated version and extensions */
#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
transform->encrypt_then_mac = session->encrypt_then_mac;
#endif
transform->minor_ver = ssl->minor_ver;
transform->minor_ver = minor_ver;
/*
* Get various info structures
@ -794,14 +807,14 @@ static int ssl_populate_transform( mbedtls_ssl_transform *transform,
}
#if defined(MBEDTLS_SSL_PROTO_SSL3) || defined(MBEDTLS_SSL_PROTO_TLS1)
if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 ||
ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_1 )
if( minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 ||
minor_ver == MBEDTLS_SSL_MINOR_VERSION_1 )
; /* No need to adjust minlen */
else
#endif
#if defined(MBEDTLS_SSL_PROTO_TLS1_1) || defined(MBEDTLS_SSL_PROTO_TLS1_2)
if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_2 ||
ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_3 )
if( minor_ver == MBEDTLS_SSL_MINOR_VERSION_2 ||
minor_ver == MBEDTLS_SSL_MINOR_VERSION_3 )
{
transform->minlen += transform->ivlen;
}
@ -830,7 +843,7 @@ static int ssl_populate_transform( mbedtls_ssl_transform *transform,
* Finally setup the cipher contexts, IVs and MAC secrets.
*/
#if defined(MBEDTLS_SSL_CLI_C)
if( ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT )
if( endpoint == MBEDTLS_SSL_IS_CLIENT )
{
key1 = keyblk + mac_key_len * 2;
key2 = keyblk + mac_key_len * 2 + keylen;
@ -850,7 +863,7 @@ static int ssl_populate_transform( mbedtls_ssl_transform *transform,
else
#endif /* MBEDTLS_SSL_CLI_C */
#if defined(MBEDTLS_SSL_SRV_C)
if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER )
if( endpoint == MBEDTLS_SSL_IS_SERVER )
{
key1 = keyblk + mac_key_len * 2 + keylen;
key2 = keyblk + mac_key_len * 2;
@ -876,7 +889,7 @@ static int ssl_populate_transform( mbedtls_ssl_transform *transform,
#if defined(MBEDTLS_SSL_SOME_MODES_USE_MAC)
#if defined(MBEDTLS_SSL_PROTO_SSL3)
if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 )
if( minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 )
{
if( mac_key_len > sizeof( transform->mac_enc ) )
{
@ -891,7 +904,7 @@ static int ssl_populate_transform( mbedtls_ssl_transform *transform,
#endif /* MBEDTLS_SSL_PROTO_SSL3 */
#if defined(MBEDTLS_SSL_PROTO_TLS1) || defined(MBEDTLS_SSL_PROTO_TLS1_1) || \
defined(MBEDTLS_SSL_PROTO_TLS1_2)
if( ssl->minor_ver >= MBEDTLS_SSL_MINOR_VERSION_1 )
if( minor_ver >= MBEDTLS_SSL_MINOR_VERSION_1 )
{
/* For HMAC-based ciphersuites, initialize the HMAC transforms.
For AEAD-based ciphersuites, there is nothing to do here. */
@ -1188,6 +1201,8 @@ int mbedtls_ssl_derive_keys( mbedtls_ssl_context *ssl )
ssl->session_negotiate,
ssl->handshake->tls_prf,
ssl->handshake->randbytes,
ssl->minor_ver,
ssl->conf->endpoint,
ssl );
if( ret != 0 )
{